Open English Wordnet
Adjectives
(s)cloudy, nebulose, nebulouslacking definite form or limits“gropes among cloudy issues toward a feeble conclusion” (H.T.Moore),
“nebulous distinction between pride and conceit” (a)nebular, nebulousof or relating to or resembling a nebula“the nebular hypothesis of the origin of the solar system” (s)nebulous, unfixedlacking definition or definite content“nebulous reasons”,
“unfixed as were her general notions of what men ought to be” (Jane Austen)